Are chest contents determined when obtained or when opened?
I've seen quite a few people mention that they're hoarding chests in hopes that if/when something is done to address the drop rates on traps (specifically the drop rate on traps that are already T7) they will be able to open those saved chests and have them roll with the updated drop rates. This strategy completely relies on chests only determining their contents when opened rather than when they're obtained. If, on the other hand, chest contents are determined when obtained instead then that strategy is not only completely useless but would also be hindering current progress. Can someone settle this matter? Are chest contents determined when obtained or when opened?